Cause of deviations from P-RNAV procedures?
Scott,
Can you advise as to the reason for the deviations that are being observed at DFW?
Are there design flaws in the P-RNAV SIDs? Do you know what criteria was used in the design? Are all aircraft flying the P-RNAV SIDs 'approved' against a proven set of criteria, such as those found in the JAA's Temporary Guidance Leaflet (TGL) 10?
A small-scale P-RNAV arrival trial has been conducted at both Gatwick and at Heathrow, and the radar plots provided show that the aircraft are nailing the procedures time and time again. A P-RNAV SID trial is due to start at Gatwick in the not-too-distant future. I'd be interested to learn as to why such deviations are being encountered with the DFW and ATL procedures.
Regards